package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import com.sun.org.apache.bcel.internal.generic.IF_ACMPEQ;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;

import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Component
@Slf4j
@Aspect
public class AutoFillAspect {

    // 切入点
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPoinCut() {
    }

    @Before("autoFillPoinCut()")
    public void autoFill(JoinPoint joinPoint) {

        log.info("开始公共字段的自动填充");
        // 获取到当前被拦截的方法上操作数据库的类型
        MethodSignature signature = (MethodSignature)joinPoint.getSignature();// 方法签名对象
        AutoFill annotation = signature.getMethod().getAnnotation(AutoFill.class);// 获得方法上的注解对象
        OperationType operationType = annotation.value(); // 获得数据库1的操作类型
        // 获取到当前被拦截的方法的参数 ---- 实体对象
        Object[] args = joinPoint.getArgs();
        if (args == null || args.length == 0) {
            return;
        }
        Object arg = args[0];
        // 准备赋值的数据
        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();

        // 根据当前不同的操作类型，为对应的属性通过反射来赋值
        if (operationType == OperationType.INSERT) {
            // 为4个公共字段赋值
            try {
                Method setCreateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setUpdateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setCreateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                // 通过反射为对象属性赋值
                setCreateTime.invoke(arg, now);
                setCreateUser.invoke(arg,currentId);
                setUpdateTime.invoke(arg,now);
                setUpdateUser.invoke(arg,currentId);
            } catch (Exception e) {
                e.printStackTrace();
            }

        } else if (operationType == OperationType.UPDATE) {
            // 为2个公共字段赋值

            try {
                Method setUpdateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                // 通过反射为对象属性赋值
                setUpdateTime.invoke(arg,now);
                setUpdateUser.invoke(arg,currentId);
            } catch (Exception e) {
                e.printStackTrace();
            }

        }


//        log.info("公共字段填充");
//        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
//        AutoFill annotation = signature.getMethod().getAnnotation(AutoFill.class);
//        OperationType operationType = annotation.value();
//
//        Object[] args = joinPoint.getArgs();
//        Object arg = args[0];
//
//        LocalDateTime now = LocalDateTime.now();
//        Long currentId = BaseContext.getCurrentId();
//
//        if (operationType == OperationType.INSERT) {
//            try {
//                Method declaredMethod = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
//            } catch (NoSuchMethodException e) {
//                e.printStackTrace();
//            }
//        }
    }

}
